Answer Posted / vidyasagar daley

from m10 to m20 are consider as nominal mix but m25 is
design mix .the ratio is also may consider as 1:1:2

calculation:

for 1cum concrete required fine,coarse aggregates are
0.46cum-fine aggregate and coarse aggregate is 0.92cum.

1(cement)/1(sand)x0.46x1440(cement
wt.kg/cum)=662kgs.or13.248bag.
(or)

25 grade mix design is 1:1:2
total = 4
cement is 1 part =1/4 = 0.25 m3 of cement
1m3 of cement =1440 kg
0.25 m3= 360 kg

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